Trimming machine for bearing sleeves



March 8, 1932. v H. L. JOHNSON ET m. 1,848,350

TRIMMING MACHINE FOR BEARING SLEEVES Filed June 10, 1929 4Sheets-Sheet 1i f 11 16 l i March 8, 1932. H. 1. JOHNSON ET AL TRIMMING MACHINE FORBEARING SLEEVES Filed June 10, 1929 4 Sheets-Sheet 2 l l l l l I P 1[7206745 7251 erbr ljlfamr @evper @0224! [Q W V ;March 8, 1932. H. LiJOHNSON ET AL TRIMMING MACHINE FOR BEARING SLEEVES Filed June 10, 1929 4Sheets-Sheet 3 March 8, 1932.

H. L JOHNSON ET AL TRIMMING MACHINE FOR BEARING SLEEVES Filed June 10,1929 4 Sheets-Sheet 4 Patented- Mar; 8, 1932 ST' A:rE5 PAT'Nri oiF FIcE.

HENRY .LrJoHNsoN 'ANDVIBEBAGER sroekrfn'rri, NILESQMIGHIGAN,ASSIGNORS'ro.

HYDRAULIC PRESSED BEARING COMPANY (3F .;WILMI1\T GTON, DELAWARE, A COR-POB-ATION or DELAWARE rnrmmms maenrnn nos BEARING SLEEVES Applicationfiled June 10,

This invention'relates to improvements in means and. methods for'trimminor sizing, articles such 7, as senn-cylmdrical bearmg' shells or backsfor same and has special reference to the trimming or sizingof the outerI peripheries offtheend flanges'of such arti I cles. l

The object of the. invention is to provide a method and means by wlnchthe operation of trimming or s z ng such: art clescan be accomplishedvery rapidly and automatically and which, will require practically noattention other than placing the articles the automatically machine, thearticles being trimmed or sized and ejectec. I

The invention resides in a machineprd vided with a rotating drum uponwhich the shell fits, a belt trained around the drumand moving inconsonancethere'with,fand trimming or sizing meanslocated to'operate onthe peripheries of the articles as they are carried around by the drumand belt In one form, scraping or cutting tools are provided. fortrimming the edges of the flanges offinished bearing shells; In anotherform of the device, grinding wheels are provided for grinding or sizingtheperiphcries of formed up flanged backs for usein- .inaking bearingshells.

One important feature ofthe relates to a verysimple knock-out device forcausing the shells to leave the drum when finished. V 7

Another .importantfeature relates to "simple means for adjustingtheicutters to prop-' erly trim different sized bearing sleeves.

In. the form of device for grinding the peripheriesof the flanges of theformed backing blanks, thegrinding wheel shape is automatica-llyoscillated endwise to cause the Wheels to wear down evenly.

Another feature relates to simple drive means associated with-the drumfor engagement withtheshells forpositively causing them to becarriedaround with the drum.

The invention will be more, readily understood by reference to theaccompanying drawings forming part of this specification and in whichz Ia 1929. Serial No. 369,689.

,FigQl is la' tlop view of a machine embody ng theinvention in oneiform;

F ig.,2'is a vertical section on the liue 2 2,

ofv Fig.;jf v I F g} 3' is an enlarged section on the line F ig sis a'transverse section throughthe,

driving drum on the line H of Fig. 1

on the line6 6 of Fig. 3-;

Fig. s a vertical longitudinal section similartoFig. 2 but'showingaslight modizf fica-tion ofthe invention; I V Flg. 8 is a fragmentarytransverse section on the line 8-8 of Fig: 7;

I Fig. 9 is'a fragmentary'verticalsectionon" the line 9 -9 of Fig. 7

Fig. 10 is a perspective view of a flanged half. bearing sleeve uponwhich the machine is intendedto operate; and

F ig ll is a similarview of a rough'blank of a sleeve back upon whichthe form of'ma chinevshown inFigs. 7 8 and 9 is intended to operate. v i{Injsaid drawings, 1'- represents generally a suitable frame cons'istingof a flat base 2 from 7 wh chs de' brackets Stand 4 rise at each side.invention The several shafts of the-machine arejournaledin saidbrackets. higher than the brackets 3 and at the rear end of the machinecarry a transverse shaft 5.

which carries a belt pulley 6 for applying power to the machine as'bythe belt 8. a At the The brackets 4 rise 0 opposite end ofthe'machinmatransverse shaft 9yis carriedby the brackets 3 andthis shaft 9 is drivenfrom the shaft 5 by means.

of a drive chain 10,*'the shaft 5 carrying the shaft 9 achain wheelchain wheel 11 and 12 for this purpose.

A mam operating shaft13 iscarried the brackets 3 and is locatedhorizontally between lation that one side or stretch of the chain 10engages a'chain wheel'lt secured to the shaft Band by which the shaft.13 is rotated'in the direction of the arrow l5 on Fig. 2. All of the;chainwheels and the drive' chain are outside of the frame 1, and thepulley 6 is I the shafts 5 and9 and verticallyin such a re locatedbetween the brackets 4. Between the brackets 3 there is a belt pulley 16secured to the driven shaft, and an endless belt 17 is trained aroundthis pulley.

At the forward ends of the brackets 4 and above the shaft 13 is arrangedanother transverse shaft 18. This is an idler shaft and carries a beltpulley 19 around which the belt 17 is trained. The shaft 13 is'locatedbetween the shafts 9 and 18 and carries a pulley or drum 2O centrallybetween the side parts of the frame, and the belt 11 is trained aroundthe under side ofthis drum, as best shown in Fig. 2. Y

At the rear of the frame and inthe lower ends of the brackets 4 ismounted another horizontal idler shaft 21 Ywhichcarries-a pul ley 2 2around which the belt 17' is trained. The shaft 21 is carried in a yokeconsisting of vertical side members 23 and a horizontal, top member 24The side members 23are pivotally mounted at the lower endsofthebrackets'4 by pivot bolts 25, thus mounting the yoke to swing back andforth. By means of the yoke, a suitable operating tension can bemaintained on the belt 17', means being pro. vided for yieldinglypulling the yokeback. This consists of pull rods 26 which pass throughprojections 27risin'g from the top bar. 24 of the yoke and carry springs28 between the frame and adjustable an abutment 29 on p nuts 30 in therods. The tension on the belt usually made of l Fi .10, and a softerbearing metal lining 34.

' "rhesehu' cylindrical sleeves are p I a pressuremethod in suitable,dies, and the 17 is such that it is yieldingly held against the drum 20.

h d vi e po tended to operate is shown in Fig. '11 and is ahalfcylindrical bearing sleeve, as shown at 31 ,having end fianges 32.These half sleeves a harder metal backing 33,

each consists of pressed steel and as shown 1n Li :e wis'e, the flanges32. consist-of the harder metal flanges 35 andouter surfaces of whichare 'c'overed'b a layer 36 of the bearingmetal.

forms outer edges 37 and 38 of the flanges 32 require trimming toproperly finish the sleeves. The rearedges 39 of the forward brackets 3are inclined upwardly and forwardly. at an angle of about 45 and serveto support a rigidcross bar 40 which carriessuitable cut.-

ters for trimming the edges 37-38 at both ends of the sleeve.

The drum 20 is of a suitable diameter to fit wit hinthe sleeves tobetrimmed, and the sleeves are adapted to be held tightly" upon.

the drum',a s they passthrough, by the belt 1'1".- Thebelt 17 contactswith the backs of the sleeves between the flanges and assists in drivingthe sleeves around with the drum.

Twocutters' or cutting tools41' are provided, having V-shaped cuttingedges 42,

which the machine is insleeves and scrape or trim them as the sleevespass through the machine. The tools 41 are mounted in tool holders 43and are arranged to project radially in relation to the flanges 30 ofthe backs 31. v The holders 43 are mounted on blocks 44 which in turnare mounted on the cross-bar 40. The tools 41 are arranged to beadjustable from and toward the drui'n 20 for regulating removed and alsotransversely. of the machine for setting accurately spaced, to match theflanges of; the slem es being trimmed. For the transverse adjustments,the tool holders are clamped to the bar 40 by bolts 45 which passthrough the two parts 43 and 44 of each holderand througha longitudinalguide slot 46 in the transverse bar 40. Nuts 47 are provided for thelower ends of the bolts 45 and which are beneath the bar 40. Preferably,the bar 40 has a shallow groove48 for receiving the nuts 47 andpreventing them turning around. 7 v

The lower blocks 44 have transverse guide projections 49 on their lowersides which extend into the slot 46 and long adjusting screws 50 whichare arranged longitudinally of 'the transverse bar 40 entering the slot46 through threaded holes in the ends of the bar knurled heads 51 forease in turning them. Each screw ,50 engages one of the tool holders. I

The inner ends of the screws 50 enter into holes provided in the blocks44, and each is provided with a groove 52near its inner end to receivethe point of a suitable set screw 53 so that the screws 50 can beeffective for moving the tool holders in both directions on thetransverse bar 40. For al-justing the tools in and out, that is towardand from the flanges to be trimmed, each block 44 is provided on itsrearend with an L-shaped projection 54, the free leg 54 of which pro ects uppast the rear end of the upper block 43 and receives an adjusting screw55 in a threaded opening. The point of the screw engages withthe rearend of the upper block 43 by means of a set screw 56 and a groove in thesame manner as the engagement of the adjusting screws 50 with the lowerblock.

These screws 55 are likewise provided with knurled heads 58. Thetools 41are clamped in suitable openings in the upper blocks 43 by set screws59. The upper blocks 43' are provided with longitudinallvextending slots60 for receiving theclamping bolts 45 and. permittingthe blocks 43 t0beadjusted back and forth, a

While the belt 17 alone, under usual con-, ditions, is eflectiveforcarrying the sleeves around with the drum 20am] trimming the edges ofthe flanges, it has been found advantageous to provide positive means ofdriving the sleeves around. This means consists of radially projectingpins 61, preferthe amount of metal I ably four thereof. Thes'e pinsproject radi-i ally fromthe' cylindrical face of the drum and arearranged at the middle of the length thereof. The :pins 61 are mountedin f radial holes 62iin the idrum 20 and are held in place by nuts635theinner ends of the pins being enlarged.- The pins are yieldinglyheld projectedbylight coiled springs 6% in the holes 62 beneath theheadsflof the pins. p

When a sleeve is placed upon the drum to b'fe'd through the mac ',tdrive Pin pins'r which may, happen to be beneath the sleevear'e pushedback, into the drum and the'neXtpin behind the sleeve engages the rearedge of the sleeve and pushes it around with'the drum. It is understoodthat during this operation the belt 17 'holds the sleeve drum.

these backs out of sheet metal the outer or pressed against the drum.While it is possible that the sleeves after passing around the drum,would fall off, it has been found best to provide a positive throw-offor stripper. This stripper consists of a yoke'65fmade up ofa cross orstripper bar 66 which extends longitudinally with the drum 20 and arms67 which are arranged between the ends. of the drum 20 and the brackets3 and are loosely mounted on the drum shaft The yoke is yieldingly heldat the lower limitof its movement by light .coiled tension springs 68which engage at one end with the bar 66 and at their other ends withpins 69 projecting in from the brackets 3. In this lower position thestripper bar 66 is in the path of the forward edges of the sleeves asthey. pass around with the drum 20. "When the sleeves engage thestripper bar 66, the yoke swings upwardly until the arms 67 contact within,-

wardly projecting stop pins 70 on the brackets 3. The yoke is stopped bythe pins 7 Oand the further rotation .of the drum 20 causes the rearedge of the sleeve to be forced away from the drum and the portion ofthe belt 17 eX- tending between the drum 20 andidler pulley 16 carriesthe finished sleeve away from the In Fig. 10 there is illustrated, oneof the flanged harder metal backs 33. Informing circumferentialedges 71are aptto be not eX- actly true to form or dimensions, and in Figs. 7 to9 inclusive there is, illustrated a modification of the machineespecially adapted for grinding these-circumferential edges 71.

Instead of the cutters'el grinding wheels 7 2 are used for this purpose.These wheels are rigidly mounted on a transverse shaft 7 3 which in turnis rotatably mounted in journal brackets 7 4 one at each side. Thebrackets are adj ustably mounted on the inclined frame sides 39 and areheld in adjusted position by bolts 7 5. The bases 76 of the brackets 7 4are slotted as shown at 77 to receive the bolts.

and the frame is provided with spaced holes 78 to receive the bolts 75and they are so arranged that ants bracketshave been ad;

j usted in one direction as far as possible the bolts 75 can be removedand entered into 9 other holes 78. Allowance is made 1forthe reductionof the wheels of about aninch in radius before they need to bereplaced.1 The 1 wheels 7 2 are spaced on the shaft 7 3by' suitable collars andsleeves which can be changed to properly space the wheels for grindingthe edges of the, flanges on sleeve backs of differing dimensions. 7Each bracket 74 is providedwith an adjusting screw 79 which is rigidlymounted on the frame, of the machine and extends through an opening inthe bracket parallelwiththe base. The bracket has an opening for're Vceiving an adjusting nut 80 inserted in the slot 79 so that by rotatingthe nut 80'the bracket canbe advanced or withdrawn, the basebolts'7-5-being loosened at this time.

The fiangesBSare usually about one-eighth of an inchthick and the wheels73 are prefer ably about one'in'ch thick and? provision is made formoving the wheel shaft'73 endwise] arm 83 and a short arm 84:. The pivotbolt 82 issecured on abracket 85 which projects out from the frame'ofthe machine. The. bracket 85 is provided with a-slot 86 extend inglongitudinally of the machine, and the pivot bolt 82 with the elbow ofthe bell-crank 81 can be adjusted; to retain'its relation with V 73 isadjusted to the wear of' the grinding the shaft-73 as the'shaftcompensate for wheels.

v The two members of the bell-crank 81 are" spaced J apart vertically toreceive between them a spacer bar 87 clamped tightly between thebell-crank members and which carries ro- I tatablyniounted in a slottherein an antifrictionroller88 for contact withaxheartshaped cam 89mounted on the shaft 13,' which carries the drum 20;

{[A light tension spring 90 holds the, roller 88against, the cam 89.The'springQOis' at- V tached to the free end of the short arm 84L of the-"bell-crank-and to the frameof the machine. 7 9 V V Upon the shaft 73there is secured a groovedring 91 and the short arm of'the bell crankengages with aring- 92 arranged in the groove of the ring 91. Toeffectthis engagement threaded pins 99 are-provided which projectthrough the upper and lower members of the bell-crank and enterfintosockets or holes in the ring 91. The ring9l is secured tightly upon theshaft and the oscilla-ting movement of the bell-crank iIhin the art wedo not ported by the cam -89 moves. the shaft with. the grinding wheels72 back and forth.

The shaft 73 may be driven by any suitable means,preferably at highspeed. For this purpose there is illustrated a coupling 93 forconnecting the shaft 73 to a source of power.

It will be understood that the action of the drum 20 and belt 17 is thesame whether the de-burring tools 41 are used to remove the surplusBabbitt metal or the grinding wheels 72 are used to true the edges ofthe flanges of the blank backs;

As many modifications I of the invention will readily suggest themselvesto one skilled limit or confine ourinvention t0 the specific details ofconstruction or arrangement of parts herein shown and described. I

Weelair'nz I r V 1. In a machine of the kind described'hav ing a bearingsleeve driving drum and a belt conveyor cooperating therewith,aknock-out device pivotally mounted to swing concentric with the drumand to be engaged by a bearing sleeve as it emerges from between thedrum and belt, and stop means forlimiting the swinging movement oftheknock-out device; 1 I 2. In a machine of the kind described havsettinthe cutters to trim both edges or corrners 0 both flanges of sleevespassedthnough the machine.

6. A machine as defined in claim 5, and relatively stationary tools forscraping the edges of the flanges of flanged bearing sleeves as thesleeves are carried around by the belt and drum, the cutting edges ofthe tools being arranged to engage the flanges at substantially themid-point of the engagement of the belt with the drum.

In testimony whereof, we have hereunto set our hands this 11th day of Ma1929.

HENRY L. JOHN ON. BERGER STOGKFLETH.

ing a drum for receivin a bearing sleeve to be trimmed, a drivingabutment mounted on the drum and adapted to engage therear edge ofasleeve to cause it to be carried around by the drum, and means foryieldingly holding the abutment out in sleeve engaging position.

3. In a machine of the kind described having a drum for receiving abearing sleeve to be trimmed, a plurality of bearing sleeve engagingabutments mounted on the drum and spaced around the same, meansyieldingly holding the abutments in bearing engaging ition andpermitting them to be pushed in, flush with the surface of the drum. W4. In a. machine for trimming the outer edges of the flanges ofhalf-cylindrical flanged bearing sleeves, a rotatable drum for receivingthe sleeves and with which the sleeves are rotated, a shaft on which thedrum is rigidly mounted, a tensioned endless belt trained around thedrum and between which and the drum the sleeves are held and carried, adriven pulley around which the belt is trained, a shaft on which thepulley is rigidly mounted, a driving shaft, the driving shaft pulleyshaft and drum shaft each carrying a sprocket wheel fixed thereon and adriving chain trained around the several sprocket wheels and by means ofwhich the belt and the drum are simultaneously direct ly driven atsubstantially the same surface speed.

' 5. A machine as defined in claim 4, and including cutters havingdivided V-sh'aped op-' erating ends, and screw means for accurately

